a lot of good about romney, thanks to some of those negative ads. romney's campaign has been outspent about 2-1 by the president in the swing states, so in the debate, rom know can talk to those voters, give specifics and contrast that with the president's record. for "cbs this morning," i'm jan crawford in denver. >> both candidates are trying to protect themselves from any verbal slip-ups. that kind of moment did not happen very often. bill, good morning. >> reporter: good morning, norah. well, look, if the conventional wisdom is that the president is leading and the challenger, mitt romney, needs a game changer, here's the question. what will the debate do to maybe allow that? look, ever since the first debate ever in 1960, and the regular debates which began in 1976, these debates have produced a memorable number of gaffes, but few instances which really changed the outcome of an election. in 1980, president jimmy carter led governor ronald reagan in the polls, but one line from reagan in their only debate put carter on the defensive and became a mantra for future challengers to a
